The Perforating Acoustically Transparent Fabric Sound Max5 HG is for front projection, with 0.4 mm hole, which is made of a environmentally friendly PVC. Sound Max5 can meet universal requirement for projection screen because of flexibility and stability. The users can set their speakers behind the screen. What's more, its unique coating technology provides high-quality picture with 1.8 Gain, so it can vividly present a high brightness and high definition image. It's a ideal choice for the home theater and large cinema.